Ronald Ray Bruner Jr. is an American drummer, composer and producer. He has played with hardcore punk/crossover thrash band Suicidal Tendencies. Bruner was part of the band that received a Grammy Award for Best Contemporary Jazz Album in 2010 for The Stanley Clarke Band.
He is the brother of musician Stephen Lee Bruner, who is better known by his stage name Thundercat. He frequently performs alongside Thundercat, Kamasi Washington, and cousin Terrace Martin as a member of the Los Angeles jazz collective West Coast Get Down. In 2015, he appeared with the collective on Washington's major-label debut album, The Epic.